# Ship Shapes vs MARPOL

The clearest difference is update cadence: Ship Shapes at every 3 weeks against MARPOL's every 2 months. Ship Shapes also leads on iOS requirement (12.1 vs 17.5). On price, review sentiment, ads and in-app purchases there is nothing between them.

Ship Shapes costs $1.99 and MARPOL $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Ship Shapes ships an update every 3 weeks, MARPOL every 2 months. Both last shipped on October 10, 2026.

## The numbers

| Metric | Ship Shapes | MARPOL |
| --- | --- | --- |
| Price | $1.99 | $1.99 |
| Rating | **[2.0 (1 ratings)](https://appshunter.io/ios/app/ship-shapes/id1451703120/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Monetization | Paid | Paid |
| Size | 10 MB | 36 MB |
| Requires iOS | **12.1** | 17.5 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Edmund Broadbent](https://appshunter.io/developer/1440789617) | [OLEKSANDR IZERGIN](https://appshunter.io/developer/1678396126) |

## What reviewers say

### Ship Shapes

[App page](https://appshunter.io/ios/app/ship-shapes/id1451703120)

Learn to recognize and memorize the main day shapes used by boats and ships through an interactive matching game. Score points by correctly matching images to their descriptions. Achieve a score of 50 or more to demonstrate mastery.

**Highlights:** Match images to descriptions, Learn ship day shape signals, Score points for correct answers, Master recognition and memorization, Interactive learning experience

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### MARPOL

[App page](https://appshunter.io/ios/app/marpol/id6563146975)

This interactive course covers the MARPOL Convention, including all annexes with detailed visuals. Engage with varied tests to master the material and aim for captain-level knowledge.

**Highlights:** Interactive MARPOL Convention course, All MARPOL Annexes included, Detailed images, Varied tests and tasks, Progress tracking to captain level

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Ship Shapes free?

Ship Shapes costs $1.99, with no in-app purchases.

### Is MARPOL free?

MARPOL costs $1.99, with no in-app purchases.

### Do Ship Shapes or MARPOL have ads?

Neither Ship Shapes nor MARPOL shows ads.

### Which is updated more often, Ship Shapes or MARPOL?

Ship Shapes ships an update every 3 weeks, and MARPOL every 2 months. Most recently, Ship Shapes was updated on October 10, 2026 and MARPOL on October 10, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*